databasedictactivator.java

使用OSGi框架开发的分布式电子辞典

/*
 * @(#)DatabaseDictActivator.java
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Library General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
package cn.edu.ynu.sei.dict.plugin.dictmanager.service;

import cn.edu.ynu.sei.dict.plugin.dictmanager.WordReader;
import cn.edu.ynu.sei.dict.plugin.dictmanager.WordWriter;
import cn.edu.ynu.sei.dict.plugin.db.connector.service.IDatabaseConnector;
import cn.edu.ynu.sei.dict.core.service.IDictEditService;
import cn.edu.ynu.sei.dict.core.service.IDictQueryService;
import java.util.Hashtable;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;

/**
 * StoneAge Database Dictionary Service activator for OSGi.
 * @author 88250
 * @version 1.0.1.0, Mar 12, 2008
 */
public class DatabaseDictActivator implements BundleActivator {

    private IDictQueryService wordReader;

    private IDictEditService wordWriter;

    private IDatabaseConnector dbConnector;

    public void start(BundleContext bundleContext) throws Exception {
        ServiceReference sr =
                bundleContext.getServiceReference(IDatabaseConnector.class.getName());
        dbConnector = (IDatabaseConnector) bundleContext.getService(sr);

        wordReader = new WordReader(dbConnector);
        wordWriter = new WordWriter(dbConnector);

        bundleContext.registerService(IDictQueryService.class.getName(),
                                      wordReader,
                                      new Hashtable());
        bundleContext.registerService(IDictEditService.class.getName(),
                                      wordWriter,
                                      new Hashtable());
    }

    public void stop(BundleContext bundleContext) throws Exception {
        this.dbConnector = null;
        this.wordReader = null;
        this.wordWriter = null;
    }
}